Record for sound-reproducing machines.



D. H. HAYWOOD. RECORD FOR SOUND RBPBODUGING MACHINES. APPLICATION FILED AUG. 23, 1909.

Patented Feb. 1, 1910.

2 SHEETS-SEE 1,

. v n. 11. HAYWOQD; v RECORD I 'OB SOUND RBPRODUGING MACHINES. v APPL'IOATION.IILED AUG. 23, 190B.

948, I37. I Pate ted Feb. 1, 1910.

INVENTOR ments in Records for Sound-Reproducing Marlnnes, of which the following is a speeification, reference being had to v the accomy nanmnnowann muiwoon; OF'NEW' roan, N. Y.

miconn FOR souivn nnrnonuomelMAcHiNns.

Y Specification of Letters Patent. Application filed August 23,1909. Serial ml 514,091.;

Patented. Feb. 1,: 1910.

To .allwhom 'it may concern:

' e .it known that I, DANIEL Hownm) HA'Y- noon, a ,citizen of the United States of America, and a resident of New York, county York, have of New York,.and State of New invented certain new and useful Improvepanying drawings, forming a part thereof.

The sound grooves of "sound reproducing machine records commonly advance, independent-1y of their sound p'roduein undula tions, in the forin of a re ula'r spira orh'elix, so that the stylus empIoyed in connection therewith has a regular and uniform trans verse feeding movement as the record *rotates.

' which, independently of its sound proc ucing' undulations, advances irregularly.

' and to-efl'ect this I provide therecord with a sound groove which advancesand recedes Theobjectof mypresent invention is to provide for an irregular transverse feedin v movement of the-st lus and to this end .-I

construct the recor with a sound roove The pre ferred form of feedingmpvement I desire to impart to the stylus 1s a to and fro movement, (the total movinentsin one direction being, of course, in excess of the total movements inthe other, whereby the stylus is gradually, though irregularly, advanced) as the record rotates. I also preferably provide the rccord'with a positioning recess so that the record may be properly positioned;

upon its support in the machine with respect to the feeding mechanism. Included among the advanta es of this form of feed are, first, that the sty us carrying arm has thereby a free swinging movement; second, the normal pressure upon the sound box diaphragm is thereby more uniformly distributed, e. such pressure is applied first'upon'one side, of the diaphragm, and then'upon-the other; third, there is a reater tendenc toward centralizing the sty us in the stum groove;' and fourth, the records so eonstructedare ada' ted only for use inthe specific form of mac ine' for which theyj are designed, or which is designed to receive them. This. latter. is a feature of great commercial irn ortance in that it tends to largely reduce t e unathorihed' copying of records, and'the unauthor- 'ized use of recordsrin machines-forwhich they were not intended.

according-to my invention.

---movement thereof as In order that my invention may-be fully understood, I have illustratedseveral forms of records, constituting embodiments thereof, in the accompanyin drawings which I will now proceed to exp ain, and will thereafter point out the novel, features in claims.

In the drawingszF-i ure 1 is'a face view of a record of the flat isk ty )e, constructed i s; 2 and 3 are similar views, illustrating di of the sound groove. Fi 4 is a view'in' side elevation of a reco of' the cylinder type, constructed in accordance with my invention.'

In Fig. l, the record comprises a fiat disk 5 of any suitable materialin the face of which appears the sound groove .6, The sound groove, so far as its sound vproducing undulations are concerned, may e of any desired character, the preferable form in this type of record :beingthat in which the depth of the groove is uniform, and the undulations are lateral. The undulations are not illustrated herein, however, first because they. are exceedin ly minute; at best and hence difficult to Show, and second because an attempt to show them -might readily obscure the illustrationof the general directionof the groovewhic'h it is most desired to make clear. groove will be' seen to be coincident with a curved 'line generated by the to and fro movement of a point in a line'radial of the disk which rotates in one direction in the plane of the face of the disk about the axis thereofi. If such an expression be permissible this curved line might be termed an oblong spiral. The groove. may readily be formediby giving the cutting stylus in form- 'ingthe. record, a lateral'to and fro movem'ent as apart of thegeneral lateral feeding the. record rotates, or lrhpartin to the sty us and a feeding movement to the disk as well-as a movement of rotation to the. disk, or a uniform lateral feeding movement- ,to the stylus and a constant to and fro lateral movement to the disk while simultaneously rotating it.

' One form o f machine for. producing .a record of the character disclosed herein is shown in a copendin application Serial No.

534,834, filed Decemher 24th, 1909.

Thegeneral direction of this a constant to and fro movement It'will of course be understood that the form of the groove, considered-in relation to .2; i L 948,137 ,I direction, is in nowa .limited to. that portant where a positive feedii's employed in has been set forth above that many'varieties What Iclaim is:

may be employed. InFig. '2 I have shown 1.- A record element for sound reproduc- "5 a form in which there are twice as many to ing machines, having in the face thereof a and fro movements in the general direction sound groove which in its general direction a s'hown in Fig. 1, as 'it is o vious from what the reproducing machine. 35 F of the groove-,as there are in the form shown advances and recedes transversel L the ele- '40 in Fig. '1,'and the changesare more abrupt mentis revolved. v

at some points than at others, while in Fi i 2. A record element for sound reproduc-- 10 3; the groove lies in aseries of concentric ing machines, having in the face thereof a semicircles upon one side of a diametric line continuous sound groove which,-independthrdughwt'he disk, while upon the otherside ently' of its sound producing undulations, 45 "of such line' it 'advaiices and ieeedes'in the advances irre larly throughout its len h. 4 manner'illustratedin'Fig. l and described 3. A recorcf disk havin in theface-t'ereis-imco'nnection therewitln 4 Y of a sound 'groove'the- 'rectionofwhich, j InFig, 4 in which thecylinderform-of independently of its soun reducing undu- ,record is illustrated, I have showna groove lations, follows a path. 'pro uced by'a point- 50 v .which advancesi'and recedes with respect to which'advances and recedes along a line; 'a t'ransverse'line"-(parallelwith the axis of radial with respect to the disk, to which a 20 rotatihw-of"the 'record) asthe record'removement of revolution in-one direction is volves,- the groove, however,- having made given about the axis of the disk in the plane I a total advance at each revolution 'of'the of the face thereof. 553' record; The enera-l direction of-this groove LA record elementvfor sound reproduc- 1 is similar to t at howi1 in Fig.1, but adapting machines, [havingin the face thereof a 25 ed"- to' the cylinder fotinofr'ecord. sound groove which n its general direction In orderithat the may bepro'perly' advancesuand recedes transversely astheele-I positioned upon its, atrierin theisouiid "i ement is revolved, the said'eleinent havingied producing machine, til preferably provide' therein an eccentricallydisposed positioning the same with anccentrically disposed po-ire'cess. p v 3o'sitioning'recesgsuch- "recess-being shown at HOWARDIIAYWOOD.

7 in Figs. 1, 2, 3,-a nd}4; This'compels the" Witnesses:

' proper angular relationship between", the LYMAN S. Annnuws, Jr., record and the mechanism, and is in, F Graves; a 

